1991-2020 Degrees Fahrenheit 1 50.7 51.5 -0.8 51 79 1927 1936 2012 2014 normal 2 47.5 46.9 0.6 70 60 1975 1934 2014 2014 normal 2014 3 46.2 42.6 3.6 125 5 2002 1910 2014 1992 top-tenth 1980 4 42.4 38.5 3.9 124 6 1899 1934 2014 1992 top-tenth 5 39.3 35.8 3.5 122 8 1982 1934 2014 1992 top-tenth 6 37.5 34.1 3.4 122 7 1969 1992 2014 2012 top-tenth 2012 7 35.9 34.0 1.9 112 17 1979 1992 2014 2013 top-third 1946 8 37.9 35.4 2.5 118 10 1899 1987 2014 2012 top-tenth 1981,2006 9 40.0 37.8 2.2 119 9 1899 1934 2014 2012 top-tenth 1981 10 42.7 40.7 2.0 119 9 1899 1992 2014 2012 top-tenth 11 45.2 43.1 2.1 120 8 1899 1934 2014 2013 top-tenth 2013 12 46.3 44.5 1.8 118 10 1899 1934 2014 2013 top-tenth 18 41.4 41.0 0.4 98 29 1979 2016 2014 2013 top-third 1902,1954,2001 24 45.1 44.5 0.6 102 24 1917 2016 2012 2014 top-third 2005,2006 36 45.6 44.5 1.1 117 7 1952 2017 2013 2014 top-tenth 48 45.9 44.5 1.4 120 2 1952 2016 2014 1934 top-tenth 1934 60 45.0 44.6 0.4 110 10 1952 2016 2014 2009 top-tenth 1943,1992,2006,2009